Horn or signaling device.



C. KNOPF.

HORN 0R SIGNALING DEVICE.

APPLvc/mn HLED MAY 6.1910. REnEwED APR.1,1*9\3.

1 ,1 84,358. Patented May 23, 19m

ATTORNEYS wh narran strains PATENT OFFICE.

CARL KIIPIEL GE? YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO LOVELL-MQCGHEELL MANUFACTURING CMPANY, A CORPYORATION F DELAWARE.

HORN OR SIGNALING DEVICE.

Speeication o Letters Patent.

Patented May 23, 1916.

implication filed May 6, 1910, Serial No. 559.726. Renewed April l,1913. Serial No. 758,266.

To all 11i/wm may camera Pie il; known that l, CARL KNorr, a Citizen ofthe United States, and a resident of the city of New York, borough ofManhattan, in the county' and State of New York, have 'invented a newand Improved Horn or Signaling leriee, of Which the following a full,Clear, and exact description.

lilly .invention relates partieularly'to that type oi horn in whichvibration is imparted to a diaphragm by means of a rotor in the forni ata toothed Wheel. My invention relates particularly to the means forproducing the sound waves and for securing the desired adjustn nt of thetoothed wheel in respect to the diaphragm.

(lne embodiment of the present invention is disclosed, in the structureillustrated in the accompanying drawings, in which like charset olreference denote corresponding p all the views, and in which# Figure 1is a side view partly in section,

of a horn or signaling device constructed and arranged in aeeordaneewith the present invention; Fig. 2 a sectional View taken ou the line2`--2 in Fig. 1, showing. the vibrator chamber as having attachedthereto a flexible shaft for .rotating the vibrator;

Fig. a eros.; section taken on the line 'l' 3 and Fig. 4 is a side view,pz l, on, showing the horn or signaling device yas having appliedthereto an electric. motor for operatlng the vibrator. tl i drawings, ahorn embodying my n illustrated as having a belt resonator 5, lXedlysecured to a diaelaniping member in the form of a al collar 6. Thiscollar has oppoendingcylindrical flanges, to one i the resonator issecured, and the which is externally threaded. A ...iplzragm (dampingmember in the a elflar 7, also provided with lv extending .flindriealflanges, by a shoulder S. Both of these interiorly threaded, and one oi'res the ange l() of the collar Cider S constitutes a seat for a 'n 9which is held between the said shoulder 8 and the end of the flange 10of the collar 6. The diaphragm 9 is construeted from any suitableresilientV vibratory material and its periphery is clamped between thevedge of the flange 10 and the shoulder 8' by sorewing the collars 'and 7together. j, The collar 7 is provided with a flange 11 tof' engage thescrew threads formed on a .oa.sing 12, which latter has end standards14, 14 to support ashaft 15. The shaft carries a toothed Wheel 13 and inone yend is formed a square recess to receive the squared end 16 oi therotary head 17 carried by` lthe flexible shaft 18. The shaft 18 is heldagainst longitudinal movement by a flange engaging beneath a screwcoupling 19 `whieh is threaded to engage a boss 20 formed on the casing12. The teeth of the wheel 13 engage wlith a stud 21, mounted on thesaid diaphragm. The stud 21 is rigidly mounted on the cupped section22of an auxiliary vibrator, which is rigidly'secured to the diaphragm 9 byrivets 23,23. The vibrator is provided with spread end sections 24, 21,which are fanshaped and disposed in close juxtapositionto the diaphragm9 or separated slightly therefrom.

The stud 21 and the teeth of the wheel 13 are straight sided andtherefore require that the stud 21 and the wheel 13 shall maintain theirrelative positions. It is'for this purpose that the pins 25, 25 areprovided which are rigidly set in sockets 26, 26 integrally formed onthe end 12. The pins 25,

are extended slidably through perforations provided in the diaphragm 9.This axial adjustment between the easing 12 and the diaphragm does notdisturb the relative vradial positions of the said diaphragm stud -21and wheel while permitting the neces: sary movement of the easing 12 toseparate the same from the diaphragm and thereby adjust the relationbetween the stud 21 and the wheeL 13. This adjustment, it willbeunderstood., is accomplished by rotating the casing 12 within the flange11 of the collar 7. The threads within the flange 11 fe d outward orinward the cup 12, while e.

diaphragm 9 is held on the shoulder 8.

When it is'desired to rotate the casing 12, the collar 6 is firstrotated to move the edge of the flange 10 from contact with thediaphragm 9 to permit the said diaphragm to rotatively slide on theshoulder Stof the collar 7. When the proper adjustment between the wheel13 and the stud 21 has been obtained, the collar 6 is revolved to forcethe flange l() against the diaphragm 9 to holdY the same tixedly inposition. In thus locking the diaphragm 9, the casing 12 is locked andthe adjustment of thesaid Wheel and the diaphragm and stud 21 thereon issecured against disarrangement.

In l? ig. 2 of the drawings there is illustrated a method of rotatingthe wheel 13 wherein is employed a flexible shaft 1S. In certaininstances it is desired to rotate the wheel 13 by employing a smallelectric motor 27 as shown in Fig. 4 of the drawings. The casing for themotor 27 is provided with a lateral opening tubular extension which isadapted to lit the screw threads formed on the boss`20. The motor isprouided with an armature shaft 29 the end whereof is provided with asquared extension 30. When the motor is secured upon the boss, thearmature shaft passing therethrough, the

squared extension 30 is seat-ed within the perforation formed in theshaft 15 in the same manner as the squared end 16 of the llexible shaft18.

When the horn is provided with the motor 27 attached as shown in Fig. 4of the drawings, the wheel 13 is rotated whenever the electric circuitfor operating the lmotor is completed. When 4 the horn is suitablymounted on an automobile or other vehicle,

and the flexible shaft, with its rotating attachment is disposed onsaidvehicle, the operation is as follows: When it is desired to sound analarm, the shaft 18 is rotated by the chaueur, thereby revolving theWheel 13. As each of the spurs of the wheel 13 pass over the stud 21,vit operates to displace outwardly from the wheel 13 the said stud, andto 'force the sections 24, 24 against the diaphragm 9, thereby producingin the diaphragm a vibration. With the passage of each of the teeth, andthe recession of the section 22 from the diaphragm 9, an independentvibration is set up in the sections 24 of the vibrator, which, throughthe rigid connection of said vibrator to the diaphragm, is communicatedto the said diaphragm. The vibrator being of lighter ma terial, andvarying in construction, will produce a set of vibrations dill'eringfrom that produced by the diaphragm 9. The interweaving, variedvibrations thus imparted to the diaphragm, and by the diaphragm to theair contained. within the body of the resonator 5, results in theformation of'compl'ex sound waves. By reason of the stri?v ing'of theteeth upon the stud 21, there is produced a cicadous sound. Thecomminglingof all the tones produces a. distinctive and individualizedalarm.

Having thus described my i-nvention,wl-.a

I claim as new and desire to securebby Let ters Patent is 1. A horn orsignaling device including a diaphragm, means for vibrating said diaphragm including a rotor, separate supports for said diaphragm and saidrotor.

one of said members, a casing having threaded engagement with the otherof said members, and adjustable toward and from said diaphragm by arotary movement about an axis at right angles to said diaphragm, a shaftprojecting through the wall of said casing and substantially parallel tosaid diaphragm, and a rotor carried by said` shaft for vibrating saiddiaphragm, and adjust? able toward and from the latter by said rotationof. said casing in respect to the diaphragm clamping members, andlocking means normally preventing the rotation of said casing in respectto the diaphragm clamping members.

3. A horn or signaling device, including a diaphragm, a toothed rotor,and means for vibrating said diaphragm upon the rotation of said rotor,said means including an intei-mediate flexible member engaging with saiddiaphragm at aA plurality of points, and

having a portion intermediate of its ends spaced from said diaphragmandin the path of the teeth of said rotor.

4. A horn or signaling device including a diaphragm, a toothed rotorrotatable about an axis substantially parallel to the ldiaphragm, adiaphragm support, a rotor-support, connections between said supportswhereby the rotor may be adjusted toward and from t e diaphragm by arotary movement of `one support in respect to the other about an axissubstantially at right angles to the diaphragm, and means connecting thediaphragm to the rotor support for prvventing rotary 'movement of thediaphragm in respect to the rotor during such adjustment. p

5. A horn or signaling device including a diaphragm, a Wear-piece havinga substantizi'y Straight lino Contacty surface, a rotor mounted torot-(ite about an axis substmitinly 'pjlu'nioi to' the diapi'iragm, adiaphragm newport :L rotor Support, one of said Slipport; beingrotatable about :m :iXiS subqtuntialy ai; right angles to said diaphragmfor effecting relative :ldjustmnt of Suid dio pln'aigm md- ,rotorltoward amai from auch other. und moans 'for holding said wcm-piece withits Contact sur-face extending in 1h@ gene-ral direction of the axis ofthe rotor fim'ing said adjustment.

In testimony whereof I have Signed this spectication in the presence oftwo subscribing witnesses.

' CARL KNOPF,

Vv'itnesses z MoRToN A. EDELSTEN, MAUD N, JARNY.

